Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nam nhat da snippets" » "pham nhat da snippets", "am nhac da snippets", "cam nhan da snippets", "nam nha da snippets", "nam nhat de snippets", "nam nhat ha snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("nam nhat da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nam nhat da snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nam nhat da snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nam nhat da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.